One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(9,10)(11,13)(12,14)(15,16)(17,18)(19,29)(20,34)(21,27)(22,26)(23,28)(24,32)(25,37)(30,39)(31,41)(33,40)(35,42)(36,44)(38,43)(45,47)(46,48)(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,13,14,16)(17,19,22,33,23,31,21,32)(18,24,27,41,28,40,26,29)(20,35,37,45,38,46,36,30)(25,42,34,39,44,48,43,47)(1,3,5,4)(2,7,8,6)(17,20,22,37,23,38,21,36)(18,25,27,34,28,44,26,43)(19,30,33,35,31,45,32,46)(24,39,41,48,40,47,29,42)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(19,31)(24,40)(29,41)(30,45)(32,33)(35,46)(39,47)(42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.